RE-class Abyssal Aviation Battleship

Siren, Abyssal RE-class aviation battleship laid down 1950

Displacement:
	98,309 t light; 102,716 t standard; 107,552 t normal; 111,421 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(1,008.54 ft / 977.69 ft) x 157.48 ft x (39.37 / 40.55 ft)
	(307.40 m / 298.00 m) x 48.00 m  x (12.00 / 12.36 m)

Armament:
      9 - 18.00" / 457 mm 47.0 cal guns - 3,850.00lbs / 1,746.33kg shells, 100 per gun
	  Breech loading guns in turret on barbette mounts, 1950 Model
	  3 x 3-gun mounts on centreline, forward evenly spread
		1 raised mount
      24 - 5.00" / 127 mm 38.0 cal guns - 55.29lbs / 25.08kg shells, 150 per gun
	  Dual purpose guns in deck and hoist mounts, 1950 Model
	  12 x 2-gun mounts on sides, forward evenly spread
		6 raised mounts
      32 - 1.57" / 40.0 mm 56.3 cal guns - 1.99lbs / 0.90kg shells, 2,000 per gun
	  Anti-air guns in deck mounts, 1950 Model
	  8 x Quad mounts on sides, evenly spread
		4 raised mounts
      24 - 1.57" / 40.0 mm 56.3 cal guns - 1.99lbs / 0.90kg shells, 2,000 per gun
	  Anti-air guns in deck mounts, 1950 Model
	  12 x Twin mounts on sides, evenly spread
		6 raised mounts
      80 - 0.79" / 20.0 mm 70.0 cal guns - 0.27lbs / 0.12kg shells, 8,000 per gun
	  Anti-air guns in deck mounts, 1950 Model
	  56 x Single mounts on sides, evenly spread
		28 raised mounts
	  24 x Single mounts on centreline, forward evenly spread
		12 raised mounts
      Weight of broadside 36,110 lbs / 16,379 kg

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	12.0" / 305 mm	752.82 ft / 229.46 m	22.97 ft / 7.00 m
	Ends:	2.01" / 51 mm	224.84 ft / 68.53 m	15.06 ft / 4.59 m
	Upper:	7.99" / 203 mm	752.82 ft / 229.46 m	26.25 ft / 8.00 m
	  Main Belt covers 118 % of normal length
	  Main Belt inclined -15.00 degrees (positive = in)

   - Torpedo Bulkhead - Additional damage containing bulkheads:
		6.00" / 152 mm	752.82 ft / 229.46 m	37.27 ft / 11.36 m
	Beam between torpedo bulkheads 147.64 ft / 45.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	16.0" / 406 mm	10.0" / 254 mm		18.0" / 457 mm
	2nd:	5.00" / 127 mm	3.00" / 76 mm		5.00" / 127 mm
	3rd:	0.24" / 6 mm	      -			      -
	4th:	0.24" / 6 mm	      -			      -

   - Armoured deck - multiple decks:
	For and Aft decks: 4.02" / 102 mm
	Forecastle: 2.01" / 51 mm  Quarter deck: 2.01" / 51 mm

   - Conning towers: Forward 17.99" / 457 mm, Aft 16.00" / 406 mm

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 6 shafts, 305,038 shp / 227,558 Kw = 31.11 kts
	Range 10,000nm at 15.00 kts
	Bunker at max displacement = 8,705 tons

Complement:
	2,969 - 3,860

Cost:
	£56.660 million / $226.639 million

Distribution of weights at normal displacement:
	Armament: 5,739 tons, 5.3 %
	   - Guns: 5,739 tons, 5.3 %
	Armour: 38,936 tons, 36.2 %
	   - Belts: 15,714 tons, 14.6 %
	   - Torpedo bulkhead: 6,225 tons, 5.8 %
	   - Armament: 7,177 tons, 6.7 %
	   - Armour Deck: 8,164 tons, 7.6 %
	   - Conning Towers: 1,656 tons, 1.5 %
	Machinery: 7,298 tons, 6.8 %
	Hull, fittings & equipment: 40,952 tons, 38.1 %
	Fuel, ammunition & stores: 9,243 tons, 8.6 %
	Miscellaneous weights: 5,384 tons, 5.0 %
	   - Hull above water: 5,184 tons
	   - Above deck: 200 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  262,946 lbs / 119,270 Kg = 90.2 x 18.0 " / 457 mm shells or 70.8 torpedoes
	Stability (Unstable if below 1.00): 1.21
	Metacentric height 14.0 ft / 4.3 m
	Roll period: 17.7 seconds
	Steadiness	- As gun platform (Average = 50 %): 88 %
			- Recoil effect (Restricted arc if above 1.00): 0.64
	Seaboat quality  (Average = 1.00): 1.76

Hull form characteristics:
	Hull has rise aft of midbreak,
	  an extended bulbous bow and a round stern
	Block coefficient (normal/deep): 0.621 / 0.625
	Length to Beam Ratio: 6.21 : 1
	'Natural speed' for length: 31.27 kts
	Power going to wave formation at top speed: 52 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 35.00 degrees
	Stern overhang: 3.28 ft / 1.00 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	15.00 %,  39.37 ft / 12.00 m,  36.09 ft / 11.00 m
	   - Forward deck:	35.00 %,  36.09 ft / 11.00 m,  36.09 ft / 11.00 m
	   - Aft deck:	42.00 %,  49.21 ft / 15.00 m,  49.21 ft / 15.00 m
	   - Quarter deck:	8.00 %,  49.21 ft / 15.00 m,  49.21 ft / 15.00 m
	   - Average freeboard:		42.85 ft / 13.06 m

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 55.6 %
		- Above water (accommodation/working, high = better): 318.6 %
	Waterplane Area: 114,833 Square feet or 10,668 Square metres
	Displacement factor (Displacement / loading): 126 %
	Structure weight / hull surface area: 270 lbs/sq ft or 1,319 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.92
		- Longitudinal: 2.20
		- Overall: 1.00
	Excellent machinery, storage, compartmentation space
	Excellent accommodation and workspace room
	Ship has slow, easy roll, a good, steady gun platform
	Excellent seaboat, comfortable, can fire her guns in the heaviest weather

Abyssal RE-class aviation battleship.

The RE-class are rarely seen, likely due to the tremendous amount of resources required to build even one warship of this scale. Additionally, as a result of their nature as aviation battleships, RE-class warships carry only half the aircraft a proper fleet carrier of their size would be able to, and share similar disadvantages to the Nelson-class battleships, due to their "all forward" armament design - a necessity to accomodate the flight deck on the aft of the ship. While the angling of this flight deck does limit the degree to which the conning tower interferes with flight operations, it does also mean that the ship has a much larger, and thus much heavier, armor belt when compared to other warships of it's size.

Additionally, compared to other 18" gun armed battleships, it is woefully under armored, resulting in it lacking any form of immunity zone against even Japanese 46 cm guns firing non-superheavy ammunition, never mind the 18"/48 Mark 1 guns of Ohio-class fast battleships.